Typewriting machine



Dec. 5, 1933. G me 1,937,692

TYPEWRITING MACHINE Filed May 17, 1929 3 Sheets-Sheet -1 INVENTOR i4|l ==n=============== ===E=Z===Z==== MWMM m 317 E mi u f R we T. T. Y B

Mm mm ZQABM/M/ WITNESSES Dec. 5, 1933. G, 50mg 1,937,692

TYPEWRITING MACHINE Filed May 17, 1929 3 Sheets-Sheet 2 INVENTOR BY 4, EM

ATTORNEY Dec. 5, 1933. G 5. ame 1,937,692

TYPEWRITING MACHINE Filed May 1'7, 1-929 3 ShOets-Sheet 3 ATTORNEY Patented Dec. 5, 1933 UNITED STATES 1,937,692 TYPEWRITING MACHINE :George G. Going, Stamford, Conn, assignor :to

Remington Typewriter Company, Ilion, N. Y.,. a corporation of New York Application 'May17, 1929. Serial No.363,757

Claims.

My invention relates. to typewriting and like machines and moreparticularly to ribbon feed and controlling mechanism and to means for automatically reversing the'direction of the feed 5 of the ribbon.

The main object .Of my invention, generally.

vide, simple, light and compact mechanism of the character specified that .maybe incorporated in portable typewriting machines in which but little room is available "for the embodiment of complicated weighty and bulky ribbon controlling, feed and reversing mechanism.

A still further object of my invention is to provide mechanism of the character specified with the aid of which a reversal in the direction of the feed of the ribbon may be automatically effected with but little resistance offered to the operating parts. i

To the above and other ends which will hereinafter appear, my invention consists in the features of construction, arrangements of parts and combinations of devices set forth in the following description and particularly pointed out in the appended claims.

In the accompanying drawings, wherein like reference characters designate corresponding parts in the different views Fig. 1 is a fragmentary, substantially .hori.-

zontal sectional view, with parts omitted, of a typewriting machine embodying my invention;

the section being taken on the line l1 of Fig.

the ribbon vibrator and some of the associated parts.

Fig. 4 is an enlarged, detail, fragmentary, top

plan View showing a portion of the ribbon COll-y incthe shaft 13 to secure the companion bracket the crank arm to the shaft.

trol, ribbon feed and automatic reversing means near one side of the machine.

Fig. 5 is-a detail, perspective View of one of the connecting arms for the universal bar.

My invention is shown embodied, in thepres- 69 ent instance, in a noiseless portable typewriting machine of the character disclosed in myapplication Serial #331,534, filed Jan. 10, 1929.

While the present invention is particularly available insuch machine, and in portable ma- 65, chines generally, by reason of the compact character of mechanism of the invention, it should be understood that the construction may be included in other styles of typewriting and like machines, and may be employed in such inachines generally, wherever found available.

The frame of the machine includes side plates 1 united by castings 2 and Sand a comb plate 4. Printing key levers 5 are connected to printing instrumentalities, (not shown) preferably as .indicated in my above mentioned application. Each of these key levers coacts with a metallic tonguefi .onan underlying universal bar '7. This bar extends from side-.to-side of the machine in front of the comb plate i and is attached near so its ends by screws 8 to foot pieces 9 of iearwardlyj.

extending bracket arms 10, preferably made of sheet metal. As shown in detail .in Fig. 5 each bracket arm 10 has cars 11 formed integral therewith. These cars '11, and the cross piece 12 which unites them, embrace a squared rock shaft l3 on three sides to rock therewith; the shank .of a

headed screw 14 passing through anopening 15 in the part 12 and engaging a tapped opening arm inoplace. Thisformsa firm ccnnect'i'on bee tween the universal bar 7 and rock shaft 13 and enables .thetparts to be readily assembled and connected. l

The rock shaft 13 is mounted at its ends on 95.

pivotscrews 16 received in tapped openingsin the l side plates .1 of the frame. This rock shaft carries a second pair of np-standing crank arms 17 that are connected thereto in the same manner as the armslO Thus, each arm 1'? has lugs.

18 that embrace the rock shaft on opposite sides to rock therewith and a single screw 19 secures.

The .uppcrfree end of each crank arm 17 carriesa headed, shouldered, pivotscrewon which is pivoted theforward end of a sheet metal link 20 I 1 having at its rear end a portion :21 turned in. a plane at right angles to the body portion of the link. This rear end portion of each link 20 is, pivoted at 22 to theinwardly extending arm :23

of an operating or ribbon feed device in the nature of an angular or bell crank lever 24. Each of these levers 24 is pivoted, as at 25, on a reversing or switching member 26 in the nature of a flat curved bar or yoke that extends from side-to-side of the machine in front of the system of type bars (not shown) and is mounted for longitudinal or endwise movement transversely of the machine, as will be hereinafter more fully explained.

Each lever 24 has a rearwardly extending arm 27 that during the normal operation of the parts is adapted to vibrate past the axis of its associated ribbon spool at each operation of a printing key lever, as will be understood from an inspection of Fig. l. The arm 27 of each of these levers has pivoted thereto, at 28, a ribbon feed pawl 29 that extends inwardly from its associated arm and at its engaging end 30 is adapted to coact with the companion ratchet wheel 31 when permitted to do so, as determined by the position of the reversing bar 26.

A second or holding pawl 32 cooperates with each ratchet wheel 31 and is pivoted on the same pivotal center 25 as the companion operating lever 24. Due to this arrangement neither of the holding pawls 32 will be vibrated during the actuation of the levers 24, the active holding pawl 32 remaining in engagement with its ratchet wheel to prevent a backward movement thereof while the companion active feed pawl 29 is vibrated forward and back to advance the associated ratchet wheel and eifect a feed of the ribbon. A coiled contractile spring 33 is connected at one end to a perforated ear 34 on a holding pawl, the opposite end of said spring being connected to a perforated lug 35 on the tail of the companion feed pawl 29. The force of each spring 33 tends to force the engaging ends of both its pawls 29 and 32 into engagement with the companion ratchet wheel. It will be understood of course that a spring 33 connects the pawls 29 and 32 at each side of the machine.

It is necessary, however, to limit the extent of motion of each pair of pawls 29 and 32 under the action of its spring 33 when such pawls are thrown out of engagement with the companion ratchet wheel by a longitudinal shifting of the reversing bar 26. This is accomplished by a stop pin 36 that extends up from the reversing bar near each end thereof into the path of the companion feed pawl 29 when the latter is in the release position, as shown at the right hand side of Fig. 1. The active pawl 29 does not reach the stop pin 36 as long as such pawl remains efiective.

When, however, the reversing bar 26 is shifted, say, from right to left and the parts are shown as they are positioned in Fig. 1, then the righthand pin 36 will become effective to coact with the right-hand pawl 29 and prevent its spring 33 from forcing it into engagement with the companion ratchet wheel 31. At this time the companion holding pawl 32 will bear against the back of the associated feed pawl 29, thereby also preventing the companion holding pawl from engaging its ratchet wheel under the action of its spring 33.

Each of the ratchet wheels 31 has a hub 37 secured by a set screw 38 to a hollow shaft 39 supported in an elongated bushing or bearing member 40 provided with a circumferential supporting flange 41, said bushing being received and supported in an opening in the casting 3. The hub 3'7 coacts with the lower end of the bearing member 40 and prevents an upward displacement of the hollow shaft 39 and ratchet 31, whereas, a flanged collar 42 of the ribbon spool is connected with a drive fit to the hollow shaft 39 and supports said shaft and the ratchet wheel thereon on the flange 41.

The construction of the ribbon spools and the controlling devices 45 carried thereby are practically the same as the corresponding devices employed in the No. 6 Remington-Noiseless machine and is disclosed in my Patent No. 1,665,736 dated April 19th, 1928. In such construction the only part of the spool that is removable is the upper flange 43 and the finger piece 44 riveted thereto. The controlling member 45 is pivoted at 46 to an car 47 integral with a spool core 48 which in turn is riveted at its lower edge to the lower spool flange 49 which is fixed to the collar 42.

The controlling member 45 of each spool is in the nature of an angular or hell crank lever, one arm 50 of which has a hook at one end, said arm extending into the hollow shaft 39 through a vertical slot 39" therein and supports a weighted member or rod 51. In accordance with my present invention this member 51 constitutes an interponent, arresting device or reversing member that is movable by gravity from the ineffective full line position shown in Fig. 2, to the effective position shown in dotted lines in said figure. In this last mentioned position of the member 51 it is in the path of movement of the arm 27 of the companion actuating lever 24 for purposes which will presently appear. The other arm 52 of each controlling member 45 extends through a vertical slot 53 in the core 43 of the ribbon spool and is pressed against the innermost layer of the ribbon 54 by the weight of the member 51. When the ribbon is fully unwound from the core 48, to which an end of the ribbon is attached, pressure of the ribbon on the arm 52 of the associated controlling member 45 is released, thereby permitting the companion interponent 51 to drop and to interpose its lower end in the path of operating movement of the arm 27 of the associated lever 24.

As a printing key is depressed both lever arms 27 will be moved inward, but only one interponent 51, that on the exhausted spool, can be located in the path of its associated arm 27. The effective interponent 51 will coact with its associated arm 27 to arrest it and its lever 24 against pivotal movement but the continued depression of the printing key will cause the reactive force of said arrested lever 24 to be exerted outwardly against its pivot 25 and thus eifect a longitudinal shifting movement of the reversing bar 25. The efiect of thus shifting the bar 26 is to carry both sets of pawls 29 and 32 with it, one set of pawls (that on the side ofthe machine upon which the interponent has functioned) being moved into engagement with the companion ratchet wheel while the other set of pawls is moved out of engagement with the associated ratchet wheel.

Otherwise expressed, in the ordinary actuation of the operating levers 24 they turn to their full extent on their pivots 25. When, however, one of said levers, which constitute part of the ribbon feed or actuating means, coacts with its companion interponent 5l, this latter element acts as a resisting or arresting device for its companion lever so that further pressure from the key exerted thereon to turn it, reacts against its pivot 25 and the reversing bar 26 by which said levers 24 are carried thereby transferring the key pressure to shift said bar,

This

may be best understood from a consideration of Fig. 4. This figure shows the parts'at the right-hand sideof the machine as they are disposed at the endof the depression of a printing key and at the completion of the shifting movement of the reversing bar 26 to the right, the key being held in the depressed position. This movement of the parts in question is brought aboutby a single depression of a key and they are moved from the position shown at the righthand side of Fig. l to the position indicated in Fig. 4. effect of this is to throw left-hand pawls 29 32 out of engagement with their ratchet wheel 31 and bring about an engagement of the corresponding right-hand paw'ls with their ratchet wheel, thus winding the ribbon on the exhausted right-hand ribbon spool instead of the left-hand spool, as was the case before the shifting of the bar 26, as above described, took place. The action of the parts is automatically reversed when the left-hand spool is exhausted.

.It will be seen that eachof the arms 27, where itpasses beneath its. companion interponent 51 in the ordinary feed movement of the companion lever 24, is provided with an outwardly extending enlargement or tail piece 2%. The object of this tail piece is to prevent the companion interponent 51 from dropping behind instead of in front of the arm 27. In the event that the interponent 51 should be dropped when the arm 27 is at the end of its operating movement, then said interponent will drop on the tail piece 2% and besustained thereon until said. arm returns to normal position, when the interponent will drop in front of the arm 2'1 ready. to coacttl'ierewith at the next operation of of this bushing receives the lower end portion of the companion interponent 51 and guides it in its movement into and out of effective position.

A contractile spring 56, (Figs. 1 and 2) is connected at one end to a bracket 56 secured by screw 58 to the casting 3. of this spring is connected to an upstanding arm 59 secured to the rock shaft 13. The force of this spring exerted to effect an anti-clockwise movement of the rock shaft 13, as the parts are viewed in '2, and to return the feed pawls 29 and the other parts connected with said roclr shaft to normal position. It will be understood therefore thatthe actual feed movement of the active ratchet wheel 31, and th refore the ribbon connected therewith, is brought about by the returning spring 56, and during the return of the active feed pawl 29. It follows that a feed of the ribbon will be efiected during an upstrokeof a printing key after a reversal in the direction of feed of the ribbon has been effected by a shifting of the reversing bar during and by The other end as many as eight or nine printing operations before a reversal in the direction'oi the feed is effected, the types in the meantime striking at or about the same spot on the ribbon, which results in uneven imprintsand injury to the ribbon,

to the extent of punching holes in it in some To this ear is secured by a screw and nut connection 58 and 53 a shouldered pin 60 that receives a bearing in an opening in the right-hand side plate 1 of the The pin 60 not only constitutes a sliding support for the right-hand end of the bar, but may be used as a ringer piece by which the bar may be shifted by hand to the left to reverse the direction of the feed of the ribbon.

Two corresponding pins 81 and 62 e secured in alike manner to upstanding ears c and Stat the left-hand end of the reversing bar 26. These slide in bearing openings in the lcftehand side plate of the frame and project beyond-said plate to provide finger pieces by which the .reversing bar may be shifted to the right hand, when desired. Interposed between each of the ears 57, 63 and 64 and the side plates 1 of the machine is a washer or contact face 65 or" fiber, paper or some such suitable material on said cars, so as to reduce or eliminate any noise that might otherwise be produced by arresting the move ments of the reversing bar in opposite directions. In order that there may be an. assurance of a complete shifting of the reversing bar26 in either direction, and in order that the shifting bar may be held against accidental displacement from the position to which it has been shifted, I employ a C-shaped shiftable detent spring 66, shown in dotted lines in Fig. 1. This spring at one end is looped around a fixedpin 67 projecting up from the upper face of the casting 2 and at its other end the spring is loopedaround a pin 68 that projects down from the bottom side of the reversing bar 26. As the parts are shown in Fig. 1, the force of this spring is directed to maintain the reversing bar at the left-hand limit of its movement. When the reversing bar 26 is shifted to the right and the pin 63 passes tie dead center position, or the position where the pin 68 is in alignment fore and aft of the machine with the pin 6'7, then the force of said spring will be exrected to complete the movement of said pin and the bar 26 to which it is 00111186.;65. to right or left, depending on the position of the pin 68 to the right or left of the pin 67. A the completion of such movement the effective fo e of the spring 66 tends to hold the parts in q against accidental displacement from the sl .fted position. i

The rock shaft 13 in addition to actuating the ribbon feed and reversing means, is employed to actuate the ribbon vibrator at each printing operation. Thus, the upright arm 59, to which reference has previously been made, is secured by a screw 69 to the rock shaft 13 and ears Z0, such as those on the arms 10 and 17, which on:- brace the rock shaft on opposite sides thereof. A headed pivot pin 71 is extended through the arm 59 and provides a means for connecting the returning spring 56 to said arm 59. The pivot 71 also connects the forward end of an actuating pull link or member 72 to said arm 59 so that said link may swing laterally relatively to said arm as well as to be given a movement fore and aft of the machine by said arm. The rear end of the link 72 is provided with an upwardly directed pin 73 that projects into a slot '74 in the inwardly directed arm 75 of a horizontally disposed angular or bell crank lever pivoted, at '76, to the fixed casting 2. Intermediate the ends or" the slot '14 is a lateral slot or recess 74 in the front wall thereof, for purposes that will be presently explained. The rearwardly directed arm 77 of this lever '75, '77, is pivoted, at 78, to a link '79 that ex tends transversely of the machine from near the right-hand side thereof to a depending arm 80 or an angular or bell crank ribbon vibrating lever 81, to which the link '79 is pivoted at 82. The angular or bell crank lever 81 is pivoted at 33 to a sheet metal bracket 84 secured by screws 85 to the carriage support 86, preferably mounted for case shifting movement. An inwardly directed arm 87 on the lever 81 is pivoted at 89 to a ribbon vibrator 89, through which the ribbon 54 is threaded as it passes from one ribbon spool to the other. The lever arm 87 is substanti ny horl: zontally disposed and carries a headed pin 90, the shank of which passes through a guide slot 91 in the bracket 84. To an upright arm 92 on the bracket is pivoted, at 93, a guide arm or link 9 1 parallel with the arm 8'7 and pivoted at its inner end, at 95, to the ribbon vibrator 80. This provides for supporting the ribbon vibrator wholly from one side thereof.

It will be understood that the carriage support 86 receives a vertical case shifting movement that the ribbon vibrator the inner end of the link 79 will partake of this movement without aiiecting the train of connections between said link '79 and the universal bar 7 which are carried by a fixed portion of the maci'iine.

In order to vary the extent of throw of the ribbon vibrator and thus determine whether the upper or lower half of, say, a two color ribbon is to be brought to the printing point at each operation, and in order to silence the operation of the vibrator for inimeograph work, I provide means for adjusting the pull link 72 laterally to any one of three positions and maintaining it against accidental lateral displacement from the position to which it is adjusted.

The above mentioned means comprises a herizontally disposed bell crank lever 96 pivoted at 96 on the upper side of the casting 2. ()ne arm of this lever carries a pin 97 that works in a slot 98 in the link 72. The other arm of the lever 96 is pivoted, at 99, to a flat link 100 that extends ifore and aft of the machine at its forward lever 102 in this position the lever 96 will be maintained in the position shown in Fig. 2, thereby giving the shortest extent of throw to the ribbon and bringing the upper half thereof to the printing point.

A second position of the lever 102 is one determined by swinging it on its pivot 104 until arrested by an car 107 on said lever coacting with pin 108 extending from and fixed to the righthand side plate 1. In this position, the lever 102 will have shifted the link 72 laterally to bring he pin '73 thereon along the slot '74 to the opposite side of the recess '74: and nearer the pivot 76 or" the lever 75, '17. Each actuation of the link 72, by the operation of a printing key will, at this time, give a greater extent of movement to the lever 75, 77 and to the vibrator, bringing the lower portion of the ribbon to the printing point.

In order to bring the lever 102 to either end of its throw and retain it against accidental displacement therefrom, I employ a C-shaped spring detent 109 corresponding to the detent spring 66, hereinbefore described. This spring 109 is looped at one end around the pin 108 and at its opposite end is looped around a pin 110 carried by the lever 102. [IS the parts are set in Fig. 2, the spring 109 is exerting its force to hold the lever 102 in the position shown in said figure. When, however, the lever 102 is shi ted from the position shown a distance sufficient to carry the pin 110 across the dead center position, or across a line extending through the centers of the parts 10dand 108, then the force of the spring 109 will be exerted to force the lever 102 to and hold it against the pin 103.

When the lever 102 is midway between the two extr e positions referred to above, the link will be 1 16. in such position that the pin 73 thereon will register with the lateral slot or recess 74 in the lever arm '75 and no motion will be transmitted from the link 72 to the lever 75, 7'7 the parts controlled thereby and the vibrator will remain at rest.

In order to hold "the lever 102 in the intermediate position I have provided a detent pin 111 which extends through an opening in the ri ht-hand side plate 1. This pin is rounded on its inner contact end where it extends slightly beyond the inner face of the side plate. This pin is attached at its outer end to the free end portion of a leaf spring 112 attached to the outer side of the associated side plate 1 by a riveted end of the pin 108. The inner end of the detent pin 111 is adapted to be seated under spring pressure in a depression 113 in the outer face or" the lever 102 when the'latter is in the intermediate position referred to above, and hold the lever and the parts controlled the'eby against accidental displacement. At this time the eiTective force of the spring 109 will be practically dead centered as the pin 110 at such time will be substantially on a line between th centers of the parts 104 and 108.

It should be understood that the universal bar '7 operates only on the ribbon control mechanism, the carriage feed mechanism (not shown) being controlled by a separate universal bar 114 (Fig. 1) actuated by the type bars, as disclosed in prior application hereinbefore referred to.

t will be observed that by the present invention I provide a comparatively simple mechanism which is light in weight, compact in its structure, highly efficient dependable in use, is not liable to be injured or broken and in which there is never a time in the operation of the printing keys when the ribbon is not feeding in either one direction or the other.

While I have shown and described with considerable detail one form of construction embodying my invention, it should be understood reversing means, the combination of aribbon reversing bar mounted for shifting movement to bring about a reversal in the direction of the feed of the ribbon, ribbon feed devices mounted on said reversing bar key controlled means for actuating said ribbon feed devices at each printing operation,

and interponents movable into and out of the path of said ribbon feed devices andreleased by the ribbon to bring one or the otheroi aid interponents into the path of movement of the associated ribbon feed device and through the reaction thereof on said reversing bar cause the latter to be shifted longitudinally.

, in a ri bozo. feed and automatic reversing means, the combination of a, ribbon reversing bar mounted for longitudinal, shifting movement to bring about a reversal in the direction of the feed of the ribbon, operating devices carried by said reversing bar mounted for movement with and independently thereof, lrey controlled means for actuating said, operating devices at each. printing operation, a ribbon feed pawl actuated by each of said operating devices, and interponents each mounted for movement into and out of the path of its associated operating device and controlled by the ribbon insuoh movements, the reaction of oneorthe other of said operating devices on the reversing bar resulting in a shifting the to render one feed pawl of fective and the; other ineffective and thus reverse the direction of the feed of the ribbon.

In aribbon feed andautomatic reversing -m.eans, the conibiina'tionrof a ribbon reversing bar mounted for longitudinal shifting movement to bringabout a reversal in the direction of the of ribbon, ribbon feed devices carried by and pivoted on said reversing bar, a universal bar actuated at each printing operation, operative connections, between said universal bar and rib bcn feed deviccs,interponents each niovableinto and out of the path of its associated ribbon feed device, the reaction of each ribbon feed device against th reve bar when such device is arrested interponent resulting in effecting a shifting of. saidreversing bar, and means controlled th ribbon for determining the eifectiveness and ineffectiveness of said interponents.

4:. In a ribbon feed and automatic reversing means, the corn ation of a ri bon reversing bar mounted longitudinal s ifting movement to bring abo a reversal in the direction of the feed of the ribbon, operating devices carried by and movable on said reversing bar, means for actuating operating devices at each print ing operation, a ribbon feed pawl mounted on each. of said operating devices and actuated thereby, a ratchet wheel actuated by each of said pavvls, a ribbon spool turned intermittently by each of said ratchet wheels, interpcnen'ts one as sociated with each of operating devices to arrest its feed movement and movable into and out of the path thereof, the reaction of one or the other of the operating devices on the reversing cting a shifting movement of said bar, and ribbon controlled means for controlling said interponents.

5, In a key actuated ribbon feed and automatic means, the combination of a ribbon bring about a reversal in the direction of the feed of the ribbon, two ribbon spools, operating devices one for each ribbon spool actuated at each printing operation, one ofsaid operating devices being effective to feed the ribbon when the other in rive depending on the longia tut i of ;aid reversing bar, incansconthe key depre; on for actuating said ting devices, and means controlled by the r either of said operating decausing the reaction of its operating "ndei a key depression to be exerted g bar to shift it longitudiribbon feed and automatic reversing. th combination of a ribbon reversing shifting movement to bring about a reversal in the direction of the feed, of the ribbon,ia pair of actuating levers carried by pivoted on reversing bar, means for actuating said levers ateach printing operation, a pair of ribbon feed pawls actuated by said levers, a pair of ratchet wheels with which said pawls enact, the position of said reversing bar determining which pawl engages its ratchet wheei, and ribbon controlled arresting devices cooperative with said levers to arrest the pivotal moveinentthereof and cause the reactive force thereof to exert itself on the reversing bar to shift it.

7. A ribbon reversing mechanisrn for type writing and like machines comprising a switching member the position of which determines direction of the feed of the ribbon, a ribbon feede ing device pivoted on said switching member, key actuated means for operating said feeding device at each printingoperation, and an automaticaliy actuated arresting device adapted to be interposed in the path of and arrest said feed ing device and cause the reactive force of its operating movement to be exerted on said switching member to switch it. V

8. A ribbon reversing mechanism for typewriting and like machines comprising a switching member the position of which determines direction of the feed of the ribbon, a pair of rib bontfeeding devices pivotedion said switching member, key actuated means for operating both of said feeding devices at each printing operation, and a pair of automatically actuated arresting devices each associated with one of said feeding devices and effective to arrest it and cause the reactive force of its operating movement to be exerted on the switching member to shift it in one direction or the other depending on which arresting device is eiifective.

9. A ribbon reversing mechanism for type- Writing and like machines comprising a switching member the position of which determines direction of the feed of the ribbon, a pair of rib bon feeding devices pivoted on said switching member, key actuated means for operating both of said feeding devices at each printing operation, a pair of automatically actuated arresting reversing bar mounted forshifting movement to be exerted on the switching member to shift it I in one direction or the other depending on which arresting device is eifective, a pair of ribbon spools on which the ribbon is wound, and a pair of controlling devices one associated with each spool and by which said arresting devices are controlled, the layers of ribbon on the spools through said controlling devices maintaining the arresting devices ineffective and permitting one or the other of said arresting devices to become effective as the ribbon releases one or the other of the controlling devices.

10. A ribbon reversing mechanism for typewriting and like machines comprising a switching-member the position of which determines direction of the feed or" the ribbon, a ribbon feeding device pivoted on and supported by said switching member, key actuated means for operating said ribbon feeding device by each depression of a key, a ribbon feed pawl actuated by said feeding device, a ratchet wheel actuated by said pawl, a ribbon spool turned by said ratchet wheel, an arresting device movable into and out of the path of said feeding device and when coacting therewith causing the reactive force of the operating movement of said feeding device to shift said switching member and means controlled by the ribbon for controlling the movement of said arresting device into and out of the path of said feeding device.

11. A ribbon reversing mechanism for typewriting and like machines comprising a switching member the position of which determines direction of the feed of the ribbon, and automatically operating means for shifting said switching member in one direction or the other, said means including key actuated means for feeding the ribbon at each printing operation, and means for arresting a part of said key actuated feeding means and transferring the pressure exerted thereon to shiftsaid switching member after such arrest is eifected.

12. A ribbon reversing mechanism for typewriting and like machines comprising a switching member the position of which determines direction of the feed of the ribbon, and automatically operating means for shifting said switching member in one direction or the other, said means including key actuated means for feeding the ribbon at each printing operation, and means for arresting a part of said key actuated feeding means and transferring the pressure exerted thereon to shift said switching member, and automatically operating means controlled by the ribbon for controlling said arresting means.

13. A ribbon reversing mechanism for typewriting and like machines comprising a switching member the position of which determines direction of the feed of the ribbon, and automatically operating means for shifting said switching member in one direction or the other, said means including a key actuated pivoted ribbon feed device that is given a pivotal movement by a key depression at each printing operation, and automatically operating means for arresting the pivotal movement of said feed device and exerting the reactive force thereof on said switching member to shift it.

14. A ribbon reversing mechanism for typewriting and like machines comprising a switch ing member the position of which determines direction of the feed of the ribbon, and automatically operating means for shifting said switching member in one direction or the other, said means including a pair of pivoted ribbon feed devices one for each ribbon spool, said devices being operatively connected with said switching member, key actuated means for operating said devices at each printing operation, a pair of arresting devices one associated with each of said ribbon feed devices and cooperative therewith to arrest its pivotal ribbon feed movement and cause its reactive force to be exerted on said switching member to shift it, and means controlled by the ribbon for controlling the movement of said arresting devices into and out of cooperative relation with ribbon feed devices.

15. In ribbon feed and automatic reversing mechanism, the combination of a pair of ribbon spools, a pair of ratchet wheels one for each ribbon spool, a reversing bar mounted for longitudinal shifting movement to bring about a reversal in the direction of the feed of the ribbon, operating levers carried by and pivoted on said bar, feed pawls carried by said levers, one of said pawls coacting with each of said ratchet wheels, a key actuated universal bar, connections from said universal bar to said levers, a pair of arresting members movable into and out of the paths of pivotal movement of said levers, each of said arresting members coacting with its associated lever to arrest its pivotal operating movement and through the reactive force of the lever on said reversing bar shift the latter longitudinally in one direction or the other depending on which of said arresting members is in the path of its associated lever, and means controlled by the ribbon coiled on the ribbon spools for controlling said arresting members.

GEORGE G. GOING. 

